Examples with StreamViewId co.cask.cdap.proto.id.StreamViewId used on opensource projects

Example 11 with StreamViewId

use of co.cask.cdap.proto.id.StreamViewId in project cdap by caskdata.

the class MetadataHttpHandlerTestRun method testSystemMetadataRetrieval.

@Test
public void testSystemMetadataRetrieval() throws Exception {
    appClient.deploy(NamespaceId.DEFAULT, createAppJarFile(AllProgramsApp.class));
    // verify stream system metadata
    StreamId streamId = NamespaceId.DEFAULT.stream(AllProgramsApp.STREAM_NAME);
    Set<String> streamSystemTags = getTags(streamId, MetadataScope.SYSTEM);
    Assert.assertEquals(ImmutableSet.of(AbstractSystemMetadataWriter.EXPLORE_TAG), streamSystemTags);
    Map<String, String> streamSystemProperties = getProperties(streamId, MetadataScope.SYSTEM);
    // Verify create time exists, and is within the past hour
    Assert.assertTrue("Expected creation time to exist but it does not", streamSystemProperties.containsKey(AbstractSystemMetadataWriter.CREATION_TIME_KEY));
    long createTime = Long.parseLong(streamSystemProperties.get(AbstractSystemMetadataWriter.CREATION_TIME_KEY));
    Assert.assertTrue("Stream create time should be within the last hour - " + createTime, createTime > System.currentTimeMillis() - TimeUnit.HOURS.toMillis(1));
    Assert.assertEquals(ImmutableMap.of(AbstractSystemMetadataWriter.SCHEMA_KEY, Schema.recordOf("stringBody", Schema.Field.of("body", Schema.of(Schema.Type.STRING))).toString(), AbstractSystemMetadataWriter.TTL_KEY, String.valueOf(Long.MAX_VALUE), AbstractSystemMetadataWriter.DESCRIPTION_KEY, "test stream", AbstractSystemMetadataWriter.CREATION_TIME_KEY, String.valueOf(createTime), AbstractSystemMetadataWriter.ENTITY_NAME_KEY, streamId.getEntityName()), streamSystemProperties);
    // Update stream properties and verify metadata got updated (except creation time and description)
    long newTtl = 100000L;
    streamClient.setStreamProperties(streamId, new StreamProperties(newTtl, null, null));
    streamSystemProperties = getProperties(streamId, MetadataScope.SYSTEM);
    Assert.assertEquals(ImmutableMap.of(AbstractSystemMetadataWriter.SCHEMA_KEY, Schema.recordOf("stringBody", Schema.Field.of("body", Schema.of(Schema.Type.STRING))).toString(), AbstractSystemMetadataWriter.TTL_KEY, String.valueOf(newTtl * 1000), AbstractSystemMetadataWriter.DESCRIPTION_KEY, "test stream", AbstractSystemMetadataWriter.CREATION_TIME_KEY, String.valueOf(createTime), AbstractSystemMetadataWriter.ENTITY_NAME_KEY, streamId.getEntityName()), streamSystemProperties);
    Set<MetadataRecord> streamSystemMetadata = getMetadata(streamId, MetadataScope.SYSTEM);
    Assert.assertEquals(ImmutableSet.of(new MetadataRecord(streamId, MetadataScope.SYSTEM, streamSystemProperties, streamSystemTags)), streamSystemMetadata);
    // create view and verify view system metadata
    StreamViewId view = new StreamViewId(streamId.getNamespace(), streamId.getStream(), "view");
    Schema viewSchema = Schema.recordOf("record", Schema.Field.of("viewBody", Schema.nullableOf(Schema.of(Schema.Type.BYTES))));
    streamViewClient.createOrUpdate(view, new ViewSpecification(new FormatSpecification("format", viewSchema)));
    ImmutableSet<String> viewUserTags = ImmutableSet.of("viewTag");
    addTags(view, viewUserTags);
    Assert.assertEquals(ImmutableSet.of(new MetadataRecord(view, MetadataScope.USER, ImmutableMap.<String, String>of(), viewUserTags), new MetadataRecord(view, MetadataScope.SYSTEM, ImmutableMap.of(AbstractSystemMetadataWriter.ENTITY_NAME_KEY, view.getEntityName(), AbstractSystemMetadataWriter.SCHEMA_KEY, viewSchema.toString()), ImmutableSet.of(AllProgramsApp.STREAM_NAME))), removeCreationTime(getMetadata(view)));
    // verify dataset system metadata
    DatasetId datasetInstance = NamespaceId.DEFAULT.dataset(AllProgramsApp.DATASET_NAME);
    Set<String> dsSystemTags = getTags(datasetInstance, MetadataScope.SYSTEM);
    Assert.assertEquals(ImmutableSet.of(DatasetSystemMetadataWriter.BATCH_TAG, AbstractSystemMetadataWriter.EXPLORE_TAG), dsSystemTags);
    Map<String, String> dsSystemProperties = getProperties(datasetInstance, MetadataScope.SYSTEM);
    // Verify create time exists, and is within the past hour
    Assert.assertTrue("Expected creation time to exist but it does not", dsSystemProperties.containsKey(AbstractSystemMetadataWriter.CREATION_TIME_KEY));
    createTime = Long.parseLong(dsSystemProperties.get(AbstractSystemMetadataWriter.CREATION_TIME_KEY));
    Assert.assertTrue("Dataset create time should be within the last hour - " + createTime, createTime > System.currentTimeMillis() - TimeUnit.HOURS.toMillis(1));
    // Now remove create time and assert all other system properties
    Assert.assertEquals(ImmutableMap.of("type", KeyValueTable.class.getName(), AbstractSystemMetadataWriter.DESCRIPTION_KEY, "test dataset", AbstractSystemMetadataWriter.CREATION_TIME_KEY, String.valueOf(createTime), AbstractSystemMetadataWriter.ENTITY_NAME_KEY, datasetInstance.getEntityName()), dsSystemProperties);
    //Update properties, and make sure that system metadata gets updated (except create time)
    datasetClient.update(datasetInstance, TableProperties.builder().setTTL(100000L).build().getProperties());
    dsSystemProperties = getProperties(datasetInstance, MetadataScope.SYSTEM);
    Assert.assertEquals(ImmutableMap.of("type", KeyValueTable.class.getName(), AbstractSystemMetadataWriter.DESCRIPTION_KEY, "test dataset", AbstractSystemMetadataWriter.TTL_KEY, "100000", AbstractSystemMetadataWriter.CREATION_TIME_KEY, String.valueOf(createTime), AbstractSystemMetadataWriter.ENTITY_NAME_KEY, datasetInstance.getEntityName()), dsSystemProperties);
    // verify artifact metadata
    ArtifactId artifactId = getArtifactId();
    Assert.assertEquals(ImmutableSet.of(new MetadataRecord(artifactId, MetadataScope.SYSTEM, ImmutableMap.of(AbstractSystemMetadataWriter.ENTITY_NAME_KEY, artifactId.getEntityName()), ImmutableSet.<String>of())), removeCreationTime(getMetadata(artifactId, MetadataScope.SYSTEM)));
    // verify app system metadata
    ApplicationId app = NamespaceId.DEFAULT.app(AllProgramsApp.NAME);
    Assert.assertEquals(ImmutableMap.builder().put(ProgramType.FLOW.getPrettyName() + MetadataDataset.KEYVALUE_SEPARATOR + AllProgramsApp.NoOpFlow.NAME, AllProgramsApp.NoOpFlow.NAME).put(ProgramType.MAPREDUCE.getPrettyName() + MetadataDataset.KEYVALUE_SEPARATOR + AllProgramsApp.NoOpMR.NAME, AllProgramsApp.NoOpMR.NAME).put(ProgramType.MAPREDUCE.getPrettyName() + MetadataDataset.KEYVALUE_SEPARATOR + AllProgramsApp.NoOpMR2.NAME, AllProgramsApp.NoOpMR2.NAME).put(ProgramType.SERVICE.getPrettyName() + MetadataDataset.KEYVALUE_SEPARATOR + AllProgramsApp.NoOpService.NAME, AllProgramsApp.NoOpService.NAME).put(ProgramType.SPARK.getPrettyName() + MetadataDataset.KEYVALUE_SEPARATOR + AllProgramsApp.NoOpSpark.NAME, AllProgramsApp.NoOpSpark.NAME).put(ProgramType.WORKER.getPrettyName() + MetadataDataset.KEYVALUE_SEPARATOR + AllProgramsApp.NoOpWorker.NAME, AllProgramsApp.NoOpWorker.NAME).put(ProgramType.WORKFLOW.getPrettyName() + MetadataDataset.KEYVALUE_SEPARATOR + AllProgramsApp.NoOpWorkflow.NAME, AllProgramsApp.NoOpWorkflow.NAME).put(AbstractSystemMetadataWriter.ENTITY_NAME_KEY, app.getEntityName()).put(AbstractSystemMetadataWriter.VERSION_KEY, ApplicationId.DEFAULT_VERSION).put(AbstractSystemMetadataWriter.DESCRIPTION_KEY, AllProgramsApp.DESCRIPTION).put("schedule" + MetadataDataset.KEYVALUE_SEPARATOR + AllProgramsApp.SCHEDULE_NAME, AllProgramsApp.SCHEDULE_NAME + MetadataDataset.KEYVALUE_SEPARATOR + AllProgramsApp.SCHEDULE_DESCRIPTION).build(), removeCreationTime(getProperties(app, MetadataScope.SYSTEM)));
    Assert.assertEquals(ImmutableSet.of(AllProgramsApp.class.getSimpleName()), getTags(app, MetadataScope.SYSTEM));
    // verify program system metadata
    assertProgramSystemMetadata(app.flow(AllProgramsApp.NoOpFlow.NAME), "Realtime", AllProgramsApp.NoOpFlow.DESCRIPTION);
    assertProgramSystemMetadata(app.worker(AllProgramsApp.NoOpWorker.NAME), "Realtime", null);
    assertProgramSystemMetadata(app.service(AllProgramsApp.NoOpService.NAME), "Realtime", null);
    assertProgramSystemMetadata(app.mr(AllProgramsApp.NoOpMR.NAME), "Batch", null);
    assertProgramSystemMetadata(app.spark(AllProgramsApp.NoOpSpark.NAME), "Batch", null);
    assertProgramSystemMetadata(app.workflow(AllProgramsApp.NoOpWorkflow.NAME), "Batch", AllProgramsApp.NoOpWorkflow.DESCRIPTION);
    // update dataset properties to add the workflow.local.dataset property to it.
    datasetClient.update(datasetInstance, ImmutableMap.of(Constants.AppFabric.WORKFLOW_LOCAL_DATASET_PROPERTY, "true"));
    dsSystemTags = getTags(datasetInstance, MetadataScope.SYSTEM);
    Assert.assertEquals(ImmutableSet.of(DatasetSystemMetadataWriter.BATCH_TAG, AbstractSystemMetadataWriter.EXPLORE_TAG, DatasetSystemMetadataWriter.LOCAL_DATASET_TAG), dsSystemTags);
}

Example 12 with StreamViewId

use of co.cask.cdap.proto.id.StreamViewId in project cdap by caskdata.

the class MetadataHttpHandlerTestRun method testSearchMetadataDeleteNamespace.

@Test
public void testSearchMetadataDeleteNamespace() throws Exception {
    NamespaceId namespace = new NamespaceId("ns2");
    namespaceClient.create(new NamespaceMeta.Builder().setName(namespace).build());
    // Deploy app
    appClient.deploy(namespace, createAppJarFile(WordCountApp.class, WordCountApp.class.getSimpleName(), "1.0"));
    Set<String> tags = ImmutableSet.of("tag1", "tag2");
    ArtifactId artifact = namespace.artifact("WordCountApp", "1.0");
    ApplicationId app = namespace.app("WordCountApp");
    ProgramId flow = app.flow("WordCountFlow");
    ProgramId service = app.service("WordFrequencyService");
    StreamId stream = namespace.stream("text");
    DatasetId datasetInstance = namespace.dataset("mydataset");
    StreamViewId view = stream.view("view");
    streamViewClient.createOrUpdate(view, new ViewSpecification(new FormatSpecification("csv", null, null)));
    // Add metadata
    addTags(app, tags);
    addTags(flow, tags);
    addTags(stream, tags);
    addTags(datasetInstance, tags);
    addTags(view, tags);
    Assert.assertEquals(ImmutableSet.of(new MetadataSearchResultRecord(stream), new MetadataSearchResultRecord(view)), searchMetadata(namespace, "text"));
    Assert.assertEquals(ImmutableSet.of(new MetadataSearchResultRecord(datasetInstance)), searchMetadata(namespace, "mydataset"));
    Assert.assertEquals(ImmutableSet.of(new MetadataSearchResultRecord(app), new MetadataSearchResultRecord(flow), new MetadataSearchResultRecord(artifact), new MetadataSearchResultRecord(service)), searchMetadata(namespace, "word*"));
    Assert.assertEquals(ImmutableSet.of(new MetadataSearchResultRecord(app), new MetadataSearchResultRecord(flow), new MetadataSearchResultRecord(stream), new MetadataSearchResultRecord(datasetInstance), new MetadataSearchResultRecord(view)), searchMetadata(namespace, "tag1"));
    // Delete namespace
    namespaceClient.delete(namespace);
    // Assert no metadata
    Assert.assertEquals(ImmutableSet.of(), searchMetadata(namespace, "text"));
    Assert.assertEquals(ImmutableSet.of(), searchMetadata(namespace, "mydataset"));
    Assert.assertEquals(ImmutableSet.of(), searchMetadata(namespace, "word*"));
    Assert.assertEquals(ImmutableSet.of(), searchMetadata(namespace, "tag1"));
}

Example 13 with StreamViewId

use of co.cask.cdap.proto.id.StreamViewId in project cdap by caskdata.

the class MetadataHttpHandlerTestRun method assertDataEntitySearch.

private void assertDataEntitySearch() throws Exception {
    DatasetId datasetInstance = NamespaceId.DEFAULT.dataset(AllProgramsApp.DATASET_NAME);
    DatasetId datasetInstance2 = NamespaceId.DEFAULT.dataset(AllProgramsApp.DATASET_NAME2);
    DatasetId datasetInstance3 = NamespaceId.DEFAULT.dataset(AllProgramsApp.DATASET_NAME3);
    DatasetId datasetInstance4 = NamespaceId.DEFAULT.dataset(AllProgramsApp.DATASET_NAME4);
    DatasetId datasetInstance5 = NamespaceId.DEFAULT.dataset(AllProgramsApp.DATASET_NAME5);
    DatasetId datasetInstance6 = NamespaceId.DEFAULT.dataset(AllProgramsApp.DATASET_NAME6);
    DatasetId datasetInstance7 = NamespaceId.DEFAULT.dataset(AllProgramsApp.DATASET_NAME7);
    DatasetId dsWithSchema = NamespaceId.DEFAULT.dataset(AllProgramsApp.DS_WITH_SCHEMA_NAME);
    StreamId streamId = NamespaceId.DEFAULT.stream(AllProgramsApp.STREAM_NAME);
    StreamViewId view = streamId.view("view");
    Set<MetadataSearchResultRecord> expected = ImmutableSet.of(new MetadataSearchResultRecord(streamId), new MetadataSearchResultRecord(mystream));
    Set<MetadataSearchResultRecord> expectedWithView = ImmutableSet.<MetadataSearchResultRecord>builder().addAll(expected).add(new MetadataSearchResultRecord(myview)).build();
    // schema search with fieldname
    Set<MetadataSearchResultRecord> metadataSearchResultRecords = searchMetadata(NamespaceId.DEFAULT, "body");
    Assert.assertEquals(expectedWithView, metadataSearchResultRecords);
    // schema search with fieldname and fieldtype
    metadataSearchResultRecords = searchMetadata(NamespaceId.DEFAULT, "body:" + Schema.Type.STRING.toString());
    Assert.assertEquals(expected, metadataSearchResultRecords);
    // schema search for partial fieldname
    metadataSearchResultRecords = searchMetadata(NamespaceId.DEFAULT, "bo*");
    Assert.assertEquals(expectedWithView, metadataSearchResultRecords);
    // schema search with fieldname and all/partial fieldtype
    metadataSearchResultRecords = searchMetadata(NamespaceId.DEFAULT, "body:STR*");
    Assert.assertEquals(expected, metadataSearchResultRecords);
    // schema search for a field with the given fieldname:fieldtype
    metadataSearchResultRecords = searchMetadata(NamespaceId.DEFAULT, "body:STRING+field1:STRING");
    Assert.assertEquals(ImmutableSet.<MetadataSearchResultRecord>builder().addAll(expected).add(new MetadataSearchResultRecord(dsWithSchema)).build(), metadataSearchResultRecords);
    // create a view
    Schema viewSchema = Schema.recordOf("record", Schema.Field.of("viewBody", Schema.nullableOf(Schema.of(Schema.Type.BYTES))));
    streamViewClient.createOrUpdate(view, new ViewSpecification(new FormatSpecification("format", viewSchema)));
    // search all entities that have a defined schema
    // add a user property with "schema" as key
    Map<String, String> datasetProperties = ImmutableMap.of("schema", "schemaValue");
    addProperties(datasetInstance, datasetProperties);
    metadataSearchResultRecords = searchMetadata(NamespaceId.DEFAULT, "schema:*");
    Assert.assertEquals(ImmutableSet.<MetadataSearchResultRecord>builder().addAll(expectedWithView).add(new MetadataSearchResultRecord(datasetInstance)).add(new MetadataSearchResultRecord(dsWithSchema)).add(new MetadataSearchResultRecord(view)).build(), metadataSearchResultRecords);
    // search dataset
    ImmutableSet<MetadataSearchResultRecord> expectedKvTables = ImmutableSet.of(new MetadataSearchResultRecord(datasetInstance), new MetadataSearchResultRecord(datasetInstance2), new MetadataSearchResultRecord(datasetInstance3), new MetadataSearchResultRecord(myds));
    ImmutableSet<MetadataSearchResultRecord> expectedExplorableDatasets = ImmutableSet.<MetadataSearchResultRecord>builder().addAll(expectedKvTables).add(new MetadataSearchResultRecord(datasetInstance4)).add(new MetadataSearchResultRecord(datasetInstance5)).add(new MetadataSearchResultRecord(dsWithSchema)).build();
    ImmutableSet<MetadataSearchResultRecord> expectedAllDatasets = ImmutableSet.<MetadataSearchResultRecord>builder().addAll(expectedExplorableDatasets).add(new MetadataSearchResultRecord(datasetInstance6)).add(new MetadataSearchResultRecord(datasetInstance7)).build();
    ImmutableSet<MetadataSearchResultRecord> expectedExplorables = ImmutableSet.<MetadataSearchResultRecord>builder().addAll(expectedExplorableDatasets).add(new MetadataSearchResultRecord(streamId)).add(new MetadataSearchResultRecord(mystream)).build();
    metadataSearchResultRecords = searchMetadata(NamespaceId.DEFAULT, "explore");
    Assert.assertEquals(expectedExplorables, metadataSearchResultRecords);
    metadataSearchResultRecords = searchMetadata(NamespaceId.DEFAULT, KeyValueTable.class.getName());
    Assert.assertEquals(expectedKvTables, metadataSearchResultRecords);
    metadataSearchResultRecords = searchMetadata(NamespaceId.DEFAULT, "type:*");
    Assert.assertEquals(expectedAllDatasets, metadataSearchResultRecords);
    // search using ttl
    metadataSearchResultRecords = searchMetadata(NamespaceId.DEFAULT, "ttl:*");
    Assert.assertEquals(expected, metadataSearchResultRecords);
    // search using names
    metadataSearchResultRecords = searchMetadata(NamespaceId.DEFAULT, AllProgramsApp.STREAM_NAME);
    Assert.assertEquals(ImmutableSet.of(new MetadataSearchResultRecord(streamId), new MetadataSearchResultRecord(view)), metadataSearchResultRecords);
    metadataSearchResultRecords = searchMetadata(NamespaceId.DEFAULT, AllProgramsApp.STREAM_NAME, EntityTypeSimpleName.STREAM);
    Assert.assertEquals(ImmutableSet.of(new MetadataSearchResultRecord(streamId)), metadataSearchResultRecords);
    metadataSearchResultRecords = searchMetadata(NamespaceId.DEFAULT, AllProgramsApp.STREAM_NAME, EntityTypeSimpleName.VIEW);
    Assert.assertEquals(ImmutableSet.of(new MetadataSearchResultRecord(view)), metadataSearchResultRecords);
    metadataSearchResultRecords = searchMetadata(NamespaceId.DEFAULT, "view", EntityTypeSimpleName.VIEW);
    Assert.assertEquals(ImmutableSet.of(new MetadataSearchResultRecord(view)), metadataSearchResultRecords);
    metadataSearchResultRecords = searchMetadata(NamespaceId.DEFAULT, AllProgramsApp.DATASET_NAME);
    Assert.assertEquals(ImmutableSet.of(new MetadataSearchResultRecord(datasetInstance)), metadataSearchResultRecords);
    metadataSearchResultRecords = searchMetadata(NamespaceId.DEFAULT, AllProgramsApp.DS_WITH_SCHEMA_NAME);
    Assert.assertEquals(ImmutableSet.of(new MetadataSearchResultRecord(dsWithSchema)), metadataSearchResultRecords);
}

Example 14 with StreamViewId

use of co.cask.cdap.proto.id.StreamViewId in project cdap by caskdata.

the class MetadataHttpHandlerTestRun method testSearchMetadataDelete.

@Test
public void testSearchMetadataDelete() throws Exception {
    NamespaceId namespace = new NamespaceId("ns1");
    namespaceClient.create(new NamespaceMeta.Builder().setName(namespace).build());
    // Deploy app
    appClient.deploy(namespace, createAppJarFile(WordCountApp.class, WordCountApp.class.getSimpleName(), "1.0"));
    Set<String> tags = ImmutableSet.of("tag1", "tag2");
    ArtifactId artifact = namespace.artifact("WordCountApp", "1.0");
    ApplicationId app = namespace.app("WordCountApp");
    ProgramId flow = app.flow("WordCountFlow");
    ProgramId service = app.service("WordFrequencyService");
    StreamId stream = namespace.stream("text");
    DatasetId datasetInstance = namespace.dataset("mydataset");
    StreamViewId view = stream.view("view");
    streamViewClient.createOrUpdate(view, new ViewSpecification(new FormatSpecification("csv", null, null)));
    // Add metadata
    addTags(app, tags);
    addTags(flow, tags);
    addTags(stream, tags);
    addTags(datasetInstance, tags);
    addTags(view, tags);
    // Assert metadata
    Assert.assertEquals(ImmutableSet.of(new MetadataSearchResultRecord(stream), new MetadataSearchResultRecord(view)), searchMetadata(namespace, "text"));
    Assert.assertEquals(ImmutableSet.of(new MetadataSearchResultRecord(datasetInstance)), searchMetadata(namespace, "mydataset"));
    Assert.assertEquals(ImmutableSet.of(new MetadataSearchResultRecord(app), new MetadataSearchResultRecord(flow), new MetadataSearchResultRecord(artifact), new MetadataSearchResultRecord(service)), searchMetadata(namespace, "word*"));
    Assert.assertEquals(ImmutableSet.of(new MetadataSearchResultRecord(app), new MetadataSearchResultRecord(flow), new MetadataSearchResultRecord(stream), new MetadataSearchResultRecord(datasetInstance), new MetadataSearchResultRecord(view)), searchMetadata(namespace, "tag1"));
    // Delete entities
    appClient.delete(app);
    streamViewClient.delete(view);
    streamClient.delete(stream);
    datasetClient.delete(datasetInstance);
    artifactClient.delete(artifact);
    // Assert no metadata
    Assert.assertEquals(ImmutableSet.of(), searchMetadata(namespace, "text"));
    Assert.assertEquals(ImmutableSet.of(), searchMetadata(namespace, "mydataset"));
    Assert.assertEquals(ImmutableSet.of(), searchMetadata(namespace, "word*"));
    Assert.assertEquals(ImmutableSet.of(), searchMetadata(namespace, "tag1"));
}

Example 15 with StreamViewId

use of co.cask.cdap.proto.id.StreamViewId in project cdap by caskdata.

the class EntityIdKeyHelper method getTargetIdIdFromKey.

public static NamespacedEntityId getTargetIdIdFromKey(MDSKey.Splitter keySplitter, String type) {
    if (type.equals(TYPE_MAP.get(NamespaceId.class))) {
        String namespaceId = keySplitter.getString();
        return new NamespaceId(namespaceId);
    } else if (type.equals(TYPE_MAP.get(ProgramId.class))) {
        String namespaceId = keySplitter.getString();
        String appId = keySplitter.getString();
        String programType = keySplitter.getString();
        String programId = keySplitter.getString();
        return new ProgramId(namespaceId, appId, programType, programId);
    } else if (type.equals(TYPE_MAP.get(ApplicationId.class))) {
        String namespaceId = keySplitter.getString();
        String appId = keySplitter.getString();
        return new ApplicationId(namespaceId, appId);
    } else if (type.equals(TYPE_MAP.get(ArtifactId.class))) {
        String namespaceId = keySplitter.getString();
        String name = keySplitter.getString();
        String version = keySplitter.getString();
        return new ArtifactId(namespaceId, name, version);
    } else if (type.equals(TYPE_MAP.get(DatasetId.class))) {
        String namespaceId = keySplitter.getString();
        String instanceId = keySplitter.getString();
        return new DatasetId(namespaceId, instanceId);
    } else if (type.equals(TYPE_MAP.get(StreamId.class))) {
        String namespaceId = keySplitter.getString();
        String instanceId = keySplitter.getString();
        return new StreamId(namespaceId, instanceId);
    } else if (type.equals(TYPE_MAP.get(StreamViewId.class))) {
        String namespaceId = keySplitter.getString();
        String streamId = keySplitter.getString();
        String viewId = keySplitter.getString();
        return new StreamViewId(namespaceId, streamId, viewId);
    }
    throw new IllegalArgumentException("Illegal Type " + type + " of metadata source.");
}